Description

Cy7 Diacid(Di So3) is a functionalized cyanine dye derivative featuring two sulfonic acid groups, which impart excellent water solubility and conjugation capabilities. This compound is essential for researchers and manufacturers requiring a near-infrared (NIR) fluorescent labeling agent with enhanced biocompatibility and stability for aqueous systems. It is primarily used in the development of advanced diagnostic reagents, bioconjugates, and optical imaging probes within the life sciences and pharmaceutical industries.

Application

• Bioconjugation and Probe Synthesis: Acts as a key intermediate for labeling antibodies, peptides, proteins, and oligonucleotides with NIR fluorescence.
• In Vivo and In Vitro Imaging: Used in the formulation of contrast agents and fluorescent tags for deep-tissue imaging, tumor targeting, and cellular tracking.
• Diagnostic Assay Development: Integral to creating fluorescent sensors, lateral flow assays, and ELISA kits for high-sensitivity detection.
• Material Science and Photonics: Serves as a functional dye for developing light-harvesting materials, optical sensors, and nonlinear optical devices.
• Pharmaceutical Research: Employed in drug delivery system research to track nanocarriers and study biodistribution.

Basic Information

Product Name	Cy7 Diacid(Di So3)
CAS No.	146368-12-9
Molecular Formula	C37H41N2O9S3+
Molecular Weight	~753.92 g/mol
Synonyms	Cy7 Bis-sulfonic Acid; Cyanine7 Diacid Disulfonate; 2-[7-[1,3-Dihydro-1,1-dimethyl-3-(4-sulfobutyl)-2H-benz[e]indol-2-ylidene]-1,3,5-heptatrienyl]-1,1-dimethyl-3-(4-sulfobutyl)-1H-benz[e]indolium Hydroxide, Inner Salt; Sulfo-Cy7 Diacid; NIR-783 Diacid; Heptamethine Cyanine Di-SO3; ICG Derivative Diacid
EINECS	Contact for details

Quality Control

Our Cy7 Diacid(Di So3) is produced under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity, NMR for structural confirmation, and mass spectrometry. A Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided to ensure compliance with your research and production standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at 2-8°C for long-term stability. The product is light-sensitive (store away from light) and hygroscopic. Allow the vial to equilibrate to room temperature before opening to minimize moisture absorption.

Specification

Item	Specification
Appearance	Dark green to blue-black solid
Identification (HPLC)	Conforms to reference standard
Identification (NMR)	Conforms to structure
Purity (HPLC)	≥ 95.0%
Water Content	≤ 5.0%
Absorption (λmax)	~750 nm - 760 nm
Emission (λmax)	~770 nm - 780 nm
Solubility	Freely soluble in water, DMSO, Methanol

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.